The Firearm Blog

Reader Joe kindly sent through photos of his .45 cal Philadelphia derringer made from a kit I blogged about some time ago.

It looks great!

Here are four pics of the derringer I built in 1978 at age 19. I colored the wood by staining with a Minwax walnut and then handrubbing linseed oil over it. I did not cold blue the barrel. For some reason I inlaid the side brass pieces where the pin comes through the barrel and stock.

Thanks Joe.

If anyone else has unique, custom, interesting or a firearm with a good story. Please send pictures through!

The blackpowder cannon enthusiasts over at the Graybeard forums came up with some amazing pieces of artillery.

CU_Cannon built the “Nano-mortar”. It fires .177″ BBs. The bed it sits on is 1″ long.

Click to expand the images.

The Nano-mortar

Here is a video of it in action

Blueprints

Cal.45 built a 3mm mortar called the “Pico “Mortar”

The “Pico Mortar”

The pico mortar was build solely with a drill-press, some files and emery paper. It fires 3mm shot pellets (0.118 inch diameter) and has a maximum load of 0.2 grains of blackpowder. It has a barrel length of 8mm (0.315″) and can fire 6 meters (20 feet)

Anyways. I started with a load of about 0.2gr Swiss #2 but this did just a sizzling sound, so from the next shots on I used Swiss #1 (which is even finer in granulation: about 0.011 to 0.015 inch) which produced a nice snapping. Cheesy.

The touch hole is 0.5 millimeters = close to 0.02 inch (that makes it about 16% of the bore diameter (if one may still call it so).

Priming was done by filling the touch hole granule by granule; sweaty hands help maneuvering these tiny particlesin place.

First I wanted to enlarge the touch hole to fuse diameter and keep the rest at the smaller diameter (to keep some pressure) but the wall thickness is that small, that this wasnot possible.

Ignition with a lighter proofed to be better than trying to do it with a match: the flame produces soot but therefore does not function (kept them as size reference on the photo though).

Whatever. At first I thought that the shot would barely leve the muzzle: wrong!

Firing from the kitchen table I shot dimples into the door! This was 2.5 meters (8.2 feet) away! By the trajectory (angle of the mortar and height of impact) this means an estimated firing distance of 6 meters (about 20 feet): I would never have guessed this to be possible with a piece that has a barrel length of just 8 millimeters (0.315 inch).

The “Pico Mortar” being fired

“Pico Mortar” blueprints

Rickk built the “Nano Cannon”

The “Nano Cannon”

Now I know what only the others who have made one know… what the tremendous roar they make sounds like Grin

Bore is 3/16 (.186), so it will take a BB. Fuse is 5/64, so it will takes 1/16 fuse.

Trunions, as well as cascable, are 3/16 inch steel rod pressed into shallow 3/16 holes and then brazed in place.

All the work was done on my drill press, with some help from an angle grinder and a file for shaping.

It needs a pit more polishing, but I just couldn’t wait to fire it ! Total time into is so far is about 2 hours.

The “Nano Cannon” with carriage

I found the smoldering paper towel pieces about 15 feet away, and the gun recoils back about 6 inches!

BTW, for BB caliber, Q-tips make excellent cleaning rods.

Terry C. built the the very first micro-gonne. A hand gonne is a hand held cannon. It fires #4 buckshot.

the micro-gonne

The micro hand gonne being fired. Note the wooden rod attached.

Victor build a bigger scale hand gonne:

Th Box O’ Truth have published a two part article on the building and shooting of a 1970’s blackpowder .45 cal Philadelphia Derringer kit.

“Here’s the deal. I have a new in the box, 30 year old (warranty card dated 1978), .45 cal, Philadelphia Derringer kit. This is one of those CVA build it yourself jobs. It even comes with 100 .45 cal lead balls.

I will send this to you absolutely free, but, here is the catch, (you knew there was a catch) you must build it and after it is complete you have to take it out and touch this bad boy off! Fire for effect…

The Building

The Shooting

There is ‘big bore’ and then there is the 2 bore. Schroeder & Hetzendorfer make a cartridge called the S&H 2 Bore Blackpowder Express.

These photos are amazing

.700 nitro express next to 2 bore and 3500 grain bronze solid

.500 S&W, .45-70, .700 Nitro Express, 2 bore

The caliber equivalent of 2 bore (’bore’ is generally interchangeable with ‘gauge’ in regard to caliber) is 1.326″ or 33.68mm! The bronze solid bullet weights 3500 grain / 1/2 pound / 226.80 grams!

While technically fired from a rifle these are more like massive shotgun slugs: a heavy projectile at a low velocity. The 2500 grain bronze solid leaves the barrel at 1500 ft/s and with 17487 ft·lb of energy.

Apart from the nerve destroying recoil, heavy rifle, heavy ammo and expense these big bullets slow down dramatically after entering the game and hitting bone. A problem when hunting elephant.

They even come bigger than this. The 1 bore has a caliber of 1.67″. The A Guage/Bore, about 2″, was used for punt guns.

More info at Schroeder & Hetzendorfer.

ACE has an interesting article on the 4 bore.

UPDATE

Jay Schroeder emailed me the pricing for for the brass and bullets:

Cartridge Cases are $495.00 per 10 pack shipped.

Copper FN Solids are $295.00 per 10 pack shipped.

All components are USA made by Americans from American material.

Although it may seem expensive, you are probably not going to purchase more than one set of brass.

This essay takes a look at early firearm development up till the 1500’s. It is a fascinating read.

Certainly, the first uses of gunpowder are psychological - loud bangs and sausage-shaped rockets snaking across the battlefield to terrify men and horses. This is the role we can see for the fire lances of 1132. It is a short step from here to the early handgonne. I believe that while the bamboo pellet throwers of 1259 did not use true gunpowder, they certainly were a first application of the principle of using burning gases to throw a projectile…

Serpentine lock firearm, 1411

More here.

Have you ever heard of a punt gun?

A punt gun is a type of extremely large shotgun used in the 19th and 20th centuries for shooting large numbers of waterfowl for commercial harvesting operations. Punt guns were usually custom-designed and so varied widely, but could have bore diameters exceeding 2 inches and fire over a pound (.5 kilos) of shot at a time.

(From Wikipedia.org)

2 inches is over 50mm!

20mm is considered a cannon in the military! Unfortunately not many punt guns exist these days and most are not capable of being fired.

Here are some photos of punt guns and two videos showing one in operation.

A humorous blog post from Dave Petzal:

If you are not familiar with the 8-bore, it shoots a 1,250-grain conical bullet at about 1,500 fps, or an 860-grain round ball at 1,650 fps ….. This year, one of the .375 shooters got the chance to try it, and asked me if he should.

“Sure,” I said, “it will take you into a whole new world of pain that you never dreamed of.”

The round ball shot out of an 8 bore has a diameter on .820 inches! That is just over 20mm!

In one of the comments ThreePutt wrote:

“You teach a good lesson: One mans kick is another mans recoil.”

Very well said, I could not put it better myself!

Some of the other comments pointed out the dangers of both perceived recoil (how bad it feels to you) and actual recoil. I recommend reading the comments.

Below if a picture of an 8-bore rifle, it may be a Greener, but I am not sure:

The amazing Oleg Volk has produce an amazing photo sequence of a flint lock firearm firing. Click on the thumbnail to view the full sized photo.

olegvolk: Flint lock in operation.